data_global _chemical_name_mineral 'Filatovite' loop_ _publ_author_name 'Filatov S K' 'Krivovichev S V' 'Burns P C' 'Vergasova L P' _journal_name_full 'European Journal of Mineralogy' _journal_volume 16 _journal_year 2004 _journal_page_first 537 _journal_page_last 543 _publ_section_title ; Crystal structure of filatovite, K[(Al,Zn)2(As,Si)2O8], the first arsenate of the feldspar group ; _database_code_amcsd 0007076 _chemical_formula_sum '(K.9 Na.1) (As1.1 Si.9) (Al1.9 Zn.1) O8' _cell_length_a 8.772 _cell_length_b 13.370 _cell_length_c 14.690 _cell_angle_alpha 90 _cell_angle_beta 115.944 _cell_angle_gamma 90 _cell_volume 1549.240 _exptl_crystal_density_diffrn 2.838 _symmetry_space_group_name_H-M 'I 1 2/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' 'x,-y,1/2+z' '1/2+x,1/2-y,+z' '-x,y,1/2-z' '1/2-x,1/2+y,-z' '-x,-y,-z' '1/2-x,1/2-y,1/2-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy _atom_site_U_iso_or_equiv K 0.28451 0.00038 0.06940 0.90000 0.04650 Na 0.28451 0.00038 0.06940 0.10000 0.04650 AsT1 0.00850 0.18364 0.10767 0.55000 0.01750 SiT1 0.00850 0.18364 0.10767 0.45000 0.01750 AlT2 0.00558 0.18560 0.61510 0.94000 0.02050 ZnT2 0.00558 0.18560 0.61510 0.06000 0.02050 AlT3 0.71009 0.12077 0.17143 0.96000 0.02150 ZnT3 0.71009 0.12077 0.17143 0.04000 0.02150 AsT4 0.70229 0.11568 0.67225 0.55000 0.01770 SiT4 0.70229 0.11568 0.67225 0.45000 0.01770 O1 0.00460 0.14350 0.00100 1.00000 0.02920 O2 0.62990 0.99860 0.14180 1.00000 0.03450 O3 0.83400 0.14500 0.10760 1.00000 0.04480 O4 0.81600 0.14470 0.61310 1.00000 0.04060 O5 0.02530 0.30550 0.12040 1.00000 0.02970 O6 0.03360 0.31450 0.63450 1.00000 0.03050 O7 0.17510 0.13030 0.19700 1.00000 0.03510 O8 0.18390 0.12140 0.70480 1.00000 0.03110 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 K 0.02920 0.05670 0.04830 -0.00090 0.01220 -0.00100 Na 0.02920 0.05670 0.04830 -0.00090 0.01220 -0.00100 AsT1 0.01870 0.01890 0.01540 -0.00378 0.00783 -0.00119 SiT1 0.01870 0.01890 0.01540 -0.00378 0.00783 -0.00119 AlT2 0.02010 0.02360 0.01810 -0.00320 0.00850 -0.00140 ZnT2 0.02010 0.02360 0.01810 -0.00320 0.00850 -0.00140 AlT3 0.02070 0.01970 0.02290 -0.00090 0.00840 -0.00070 ZnT3 0.02070 0.01970 0.02290 -0.00090 0.00840 -0.00070 AsT4 0.01740 0.01540 0.01850 -0.00107 0.00627 -0.00060 SiT4 0.01740 0.01540 0.01850 -0.00107 0.00627 -0.00060 O1 0.03890 0.02920 0.02000 -0.00010 0.01340 -0.00310 O2 0.03030 0.02030 0.04180 0.00270 0.00560 0.00470 O3 0.03420 0.06200 0.04760 -0.01760 0.02640 -0.00690 O4 0.02900 0.06000 0.03770 -0.00800 0.01910 0.00060 O5 0.03120 0.02010 0.03520 -0.00360 0.01210 -0.00420 O6 0.02380 0.02410 0.03860 -0.00430 0.00910 -0.00460 O7 0.03590 0.03710 0.02110 0.00470 0.00230 0.00340 O8 0.03050 0.03540 0.02120 0.00510 0.00560 0.00080